Bell-hammer.



PATBNTED JUNE 4, 1907.

C. E. GIBRDING. BELL HAMMER.

APPLICATION FILED JUNE 18, 1906.

fzveriior: (24% fqxu 'THE MURRIS PETERS C0, WASHINGTON, n. c.

EETTEE STATES PATENT oEEroE.

CHARLES E. GIERDING, OF NEWARK, NEW JERSEY, ASSIGNOR TO STERLING- MEAKERCOMPANY, OF NEWARK, NEW JERSEY, A CORPORATION OF YE JERSEY.

BELL-HAMMER Specification of Letters Patent.

Patented June 4, 1907.

Application filed June 18, 1906. Serial No. 322,332.

To all, whmn it may concern:

Be it known that I, CHARLES E. GIERDING, a citizen of the United Statesof America, and a resident of Newark, in the State of New Jersey, haveinvented a new and useful Improvement in Bell-Hammers, of which thefollowing is a specification.

This invention relates to the bell mechanism or alarm mechanism ofregisters or recorders or combined registers and recorders in generalherein referred to in common as registers, and consists in certain novelcombinations of parts hereinafter described .and claimed.

The objects of the present invention are to render a face part of thebell-hammer independently spring retracted and at the same time tight asagainst rattling, so as to insure sharp and well defined strokes of thebell, however rapid the registering movement may be, and to accomplishthis important result without sacrificing the form of the swinginghammer of any required leverage, which is almost universally preferred.

A sheet of drawings accompanies this specification as part thereof.

Figures 1 and 2 are side elevations, showing one and the same side ofthe bell hammer; Fig. 1. showing the bell hammer at rest, and Fig. 2illustrating its operation by full and dotted lines as hereinafterdescribed. Fig. is a view of the bell hammer from the left-hand side of.Fig. 1.

Like reference characters refer to like parts U in all the figures.

The improved bell hammer, a, is of the swinging type, and is pivotallysupported in proper relation to a bell, b, Figs. 1 and 2, and externalthereto, in any position that may best accommodate it to the other partsof the register, as, for example, by means of a rock shaft, 0, thebearings of which include a bracket, (Z; and a tensile striking spring,(2, is stretched from an arm, 1, of said rock shaft to a relativelyfixed stud, 2; said rock shaft 0 carrying the bell hammer a; This bellhammer is characterized by an attached and spring retracted face part,3, which is projected into contact with the bell b by momentum when apair of stop shoulders, 4 and 4, Figs. 1 and 2, on the bell hammer a anda relatively fixed part, preferably said bracket d come in contact; theinstantaneous retraction of said face part 3 by its spring,

f, insuring clear and sharply defined strokes of the bell.

Said face part 3 is constructed with a central stem, 3 perpendicular toits back, extending rearwardly through the body part of the bell hammer,a, by which said stem is adequately supported and guided, and headed atits rear end, and the spring is in the form of a helical coil inclosingsaid stem between its head and the back of the hammer body.

When the bell hammer a is at rest the parts occupy the positions inwhich they are shown in Fig. 1 and Fig. 3. When the register of whichthe bell-hammer forms a part is actuated, motion is imparted to thebellhammer, as, for example, by the interaction of a moving part of theregister mechanism with a stud, 5, on the bell hammer a, and the bellhammer is turned against the resistance of the striking spring 6, intothe position in which it is shown in full lines in Fig. 2. Upon thecompletion of this movement the bell hammer a is tripped or freed, so asto permit the face part 3 of the bell hammer to strike the bell I) underthe impulse of the spring f as in dotted lines in Fig. 2. The face part3 reaches the bell b in such movement after the stop shoulders 4 and 4come in contact, by the momentum of the face part 3 overcoming itsretracting spring f as above described, and the face part is immediatelyrestored to its normal retracted position, shown in Fig. 1.

Suitable means for so moving the bell hammer a against the resistance ofthe striking spring e, and for tripping the same, are shown in Figs. 1and 2 mainly in dotted lines; the parts being located behind the bell b.A working pawl g rotates step by step a ratchet wheel h concentric withthe bell; and a detent pawl i, interacting with such ratchet wheel, isconstructed with an extension 6 to contact with said stud 5 on the bellhammer. This detent pawl has a fixed pivot 7, and may be suitablyspring-pressed in any known or improved manner.

For the purposes of this invention the accessories of the bellhammer maybe of any known or improved description.

Having thus described said improvement, I claim as my invention, anddesire to patent under this specification:

In combination with the bell of a register, a swinging bell hammer and arelatively fixed pivotal support for the same provided respectively withstop shoulders normally in contact with each other, a tensile springconnected with the bell hammer and tending to hold the same in itsnormal position, means whereby said bell hammer is adapted to be movedagainst the tension of said spring and tripped for its effective returnmovement, a

movable face part provided with a stem extending through the body partof the bell hammer and having a head at its rear end, and a helicalspring surrounding said stem between its head and the body of thehammer, said spring interacting with said stem to permit said face partto be projected into contact with the bell by momentum and toinstantaneously retract said face part out of contact with the bell,substantially as hereinbefore specified.

CHAS. E. GIERDING. Witnesses:

WALTER BEYERS, GEORGE E. WILLIs.

